NOCO

3000A 24V Boost MAX UltraSafe Jump Starter

SKU: GB251
Lititz, PA
M-F 6:30am-8:30pm; Sat 6:30am-4:00pm
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Introducing the most powerful lithium jump starter yet, the Boost MAX GB251, engineered for the largest and most challenging engine starts, including gasoline and diesel engines up to 32 liters with over 3000 amps of starting power. This commercial-grade unit is capable of jump starting almost every type of vehicle and equipment, from semi-trucks (up to class 8) to construction and agricultural machinery. It features enhanced UltraSafe 2.0 technology, which provides a simple, mistake-free design with spark-proof connections, reverse polarity protection, and enhanced thermal efficiency for longer battery life. The GB251 recharges 4X faster from 0-100% in just 8.5 hours using the vehicle's 12 volt auxiliary port or the XGC4 4 amp power adapter. Beyond starting, it is equipped with two built-in 2.1A USB ports for charging multiple devices with over 137 watt-hours of lithium power, a 600 Lumen LED flashlight with various emergency modes, and an integrated voltmeter that doubles as a 60 second jump-start countdown timer. Despite its immense power, this unit utilizes high-discharge lithium technology to remain incredibly compact and lightweight, weighing only 14 pounds, and comes with a portable carrying case for ultimate convenience.

Includes: GB251+ Lithium Battery Jump Starter, 56-Watt XGC Power Adapter, 12-Volt 2-Foot XGC Cable, Protective Carrying Case, & User Guide & Warranty Information.

  • 60-second jump start
  • UltraSafe 2.0 technology features spark-proof technology & reverse polarity protection
  • Enhanced thermal efficiency & power management for better performance & life
  • USB-C power bank core conveniently charges all kinds of devices
  • Over 137 watt-hours of lithium power
  • Integrated voltmeter to help pinpoint battery issues
  • 600 Lumen LED flashlight with SOS & emergency strobe modes
  • High-discharge lithium technology makes it compact and lightweight at only 14 lb
Specifications chevron-down chevron-up
Brand NOCO
Date Added Feb 12, 2026
UPC 046221190410
Store Location (Lititz, PA) Aisle 10 End Cap
Package Length (in) 13.90"
Package Width (in) 19.40"
Package Height (in) 9.80"
Manufacturer Part Number GB251
What's In The Box GB251+ Lithium Battery Jump Starter, 56-Watt XGC Power Adapter, 12-Volt 2-Foot XGC Cable, Protective Carrying Case, User Guide & Warranty Information
Starting Current 3000 Amps (Peak)
Voltage 24 Volt
Battery Types 24 Volt Lead-Acid Battery Systems
Internal Battery 137 Watt-Hour Lithium-Ion
Operating/Storage Temperature -4°F to 122°F (-20°C to +50°C)
Charging Temperature 32°F to 104°F (0°C to +40°C)
Cooling Natural Convection
USB Output Dual 5 Volts, 2.1 Amps Max
XGC Input 12 Volts, 4 Amp
XGC Output 12 Volts, 15 Amp
Gas/Diesel Engine Rating Up to 32 Liters
LED Flashlight 600 Lumens
Product Size Height: 8.62" (218.9mm)
Product Width 12.43" (315.7mm)
Product Depth 3.68" (93.5mm)
Weight 14.7 lb (6.67kg)
IP Rating IP65 (w/ Ports Closed)
Limited Warranty 1 Year Hassle-Free Warranty
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